From: Borislav Petkov bp@suse.de
[ Upstream commit cf089611f4c446285046fcd426d90c18f37d2905 ]
Lianbo reported a build error with a particular 32-bit config, see Link below for details.
Provide a weak copy_oldmem_page_encrypted() function which architectures can override, in the same manner other functionality in that file is supplied.
Reported-by: Lianbo Jiang lijiang@redhat.com Signed-off-by: Borislav Petkov bp@suse.de CC: x86@kernel.org Link: http://lkml.kernel.org/r/710b9d95-2f70-eadf-c4a1-c3dc80ee4ebb@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- fs/proc/vmcore.c | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c index 885d445afa0d9..ce400f97370d3 100644 --- a/fs/proc/vmcore.c +++ b/fs/proc/vmcore.c @@ -164,6 +164,16 @@ int __weak remap_oldmem_pfn_range(struct vm_area_struct *vma, return remap_pfn_range(vma, from, pfn, size, prot); }
+/* + * Architectures which support memory encryption override this. + */ +ssize_t __weak +copy_oldmem_page_encrypted(unsigned long pfn, char *buf, size_t csize, + unsigned long offset, int userbuf) +{ + return copy_oldmem_page(pfn, buf, csize, offset, userbuf); +} + /* * Copy to either kernel or user space */